package servlet;

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.google.gson.JsonObject;

import DB.CouchDB;
import Utility.Base64;
import Utility.mail;

public class Reminder extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public Reminder() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		/*
		 * response.setContentType("text/html"); PrintWriter out =
		 * response.getWriter(); out.println(
		 * "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
		 * out.println("<HTML>");
		 * out.println("  <HEAD><TITLE>A Servlet</TITLE></HEAD>");
		 * out.println("  <BODY>"); out.print("    This is ");
		 * out.print(this.getClass()); out.println(", using the GET method");
		 * out.println("  </BODY>"); out.println("</HTML>"); out.flush();
		 * out.close();
		 */
		doPost(request, response);
	}

	/**
	 * The doPost method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to
	 * post.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		String path = request.getContextPath();
		String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
		response.setContentType("application/json");
		PrintWriter out = response.getWriter();
		JsonObject  object = new JsonObject ();
		String email = (String) request.getAttribute("email");
		// email is valid
		if (mail.validEmail(email)) {
			CouchDB db = new CouchDB();
			if (db.checkUserExist(email)) {
				if (!mail.noDupEmail(email, System.currentTimeMillis(),
						"", CouchDB.REMDB)) {
					object.addProperty("message","You can only request a reminder mail for every 5 minutes");
				} else {

					// the email exists
					JsonObject user = db.getUser(email);
					mail.sendPasswdMail(email, Base64.DecoderBase64(CouchDB.eraseQuotation(user.get(
							"passwd").toString())));

					object.addProperty("message","A email of your password has been sent to you, please check it");
				}
				// not exists
			} else {
				object.addProperty("message","The email address is not exists, please try another one");
			}
			// email is invalid
		} else {

			object.addProperty("message","The email address is invalid, please register again");
			
		}
		out.print(object);
		
	}

	/**
	 * Initialization of the servlet. <br>
	 * 
	 * @throws ServletException
	 *             if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}
